CN109697854A - The urban road traffic state assessment method of various dimensions - Google Patents
The urban road traffic state assessment method of various dimensions Download PDFInfo
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- CN109697854A CN109697854A CN201910137576.5A CN201910137576A CN109697854A CN 109697854 A CN109697854 A CN 109697854A CN 201910137576 A CN201910137576 A CN 201910137576A CN 109697854 A CN109697854 A CN 109697854A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0125—Traffic data processing
- G08G1/0133—Traffic data processing for classifying traffic situation
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0125—Traffic data processing
Abstract
The present invention provides a kind of urban road traffic state assessment method of various dimensions, comprising the following steps: step 1, obtains vehicles while passing each section moment according to vehicle location information；A length of interval when step 2, to set the period calculates section real-time traffic operation characteristic parameter；A length of interval when step 3, to set the period calculates road network real-time traffic operation characteristic index；Step 4, with the when a length of measurement period in day, road network whole day traffic circulation state index is calculated；Step 5, according to the road network whole day traffic circulation state index that same date does not obtain in designated period of time, road grid traffic operation situation evaluation index in designated period of time is calculated；Step 6, for specified city collection, the standardized value of each urban road network traffic operation situation evaluation index is obtained.The present invention facilitates comprehensive characterization and assessment urban highway traffic operation conditions.
Description
Technical field
The present invention relates to urban traffic control technical field, the urban road traffic state of especially a kind of various dimensions is assessed
Method.
Background technique
China's urban traffic blocking has been risen to the hot spot of society of whole people concern by traffic problems, and traffic is slow
Formulation, implementation and the assessment of stifled measure need quantization, evaluable mechanism is supported.With the development of intelligent transportation and complete
The application of social informatization, intelligent terminal equipment, carrying out assessment to urban transportation operating condition by mass data becomes
It may.The floating car data that the cities such as Beijing, Shenzhen are obtained by public passenger transportations industries such as bus, taxis, towards
This city issuing traffic runs index, to the real-time monitoring and evaluation of urban road network traffic operation conditions；Gao De, Baidu, drop drop
Data, the big and medium-sized cities issuing traffics that orient towards the whole country such as navigation, the vehicle driving that equal Internet companies grasp according to company itself are gathered around
Stifled index carries out lateral comparison analysis to the congestion level between different cities.
However, the evaluation index and method on going result are to carry out urban road by the traffic circulation data of acquisition
Traffic behavior is assessed in real time, and the assessment mode of planarization lacks to different periods, the collision of not same date traffic circulation data
With excavation, urban highway traffic can not be effectively assessed in the variation characteristic of time dimension.Therefore, in order to more fully reflect road network
Traffic circulation state, it is necessary to establish a set of towards the various dimensions of statistical data, progressive, comparable traffic by force in one period
Operating status appraisal procedure.
Summary of the invention
It is an object of the present invention to overcome the shortcomings of the prior art and provide a kind of urban highway traffics of various dimensions
State evaluating method realizes the progressive calculating of the traffic circulation Situation Assessment index based on statistical data, helps to retouch comprehensively
Draw and assess urban highway traffic operation conditions；The technical solution adopted by the present invention is that:
A kind of urban road traffic state assessment method of various dimensions, comprising the following steps:
Step 1, vehicles while passing each section moment is obtained according to vehicle location information；
A length of interval when step 2, to set the period calculates section real-time traffic operation characteristic parameter；
A length of interval when step 3, to set the period calculates road network real-time traffic operation characteristic index；
Step 4, with the when a length of measurement period in day, road network whole day traffic circulation state index is calculated；
Step 5, according to the road network whole day traffic circulation state index that same date does not obtain in designated period of time, when calculating specified
Road grid traffic operation situation evaluation index in phase；
Step 6, when there are multiple cities to carry out that assessment is comprehensively compared, for specified city collection, each city road network is obtained
The standardized value of traffic circulation Situation Assessment index.
Further, in step 2, at the end of each period, the real-time in net vehicle number, real-time stroke of each section is calculated
Three speed ratio, real-time congestion status real-time traffic operation characteristic parameters；It specifically includes:
Step 2.1, it for section i, when to set the period after period j at a length of interval, filters out in the period
Leave the vehicle in section；
Step 2.2, the vehicle fleet n that calculating sifting goes outij, section of the section i in period j is defined as in real time in net vehicle
Number exports section in real time in net vehicle number characteristic parameter；
Step 2.3, for the vehicle filtered out, at the time of ingressing and egressing out each section according to vehicle, it is logical to calculate each car
Cross the journey time of section i
Step 2.4, average travel speed v of the section i in period j is calculatedij, calculation formula are as follows:
vij=li/tij
Wherein,
The journey time for the kth vehicle that section i passes through in period j；
tij: average travel time of the section i in period j；
li: the road section length of section i；
Step 2.5, travel speed ratio TSR of the section i in period j is calculatedij, export the real-time travel speed in section and compare feature
Parameter, calculation formula are as follows:
Wherein,The section speed limit of section i；
Step 2.6, congestion status value c of the section i in period j is calculatedij, as travel speed ratio TSRijMore than or equal to phase
When answering given threshold, judgement is in congestion status, enables congestion status value cijIt is 1；Conversely, working as travel speed ratio TSRijLess than phase
When answering given threshold, judgement is in normal operating condition, enables congestion status value cijIt is 0；Road congestion state characteristic parameter is exported,
Calculation formula are as follows:
Wherein thd1 is congestion status threshold value.
Further, in step 3, according to the real-time traffic operation characteristic parameter in each section, at the end of each period, meter
Calculate than two real-time traffic operation characteristic indexs of travel speed ratio, congestion mileage of road network；
Step 3.1, according to the real-time in net vehicle number characteristic parameter of each section, section power of the section i in period j is calculated
Weight wij, calculation formula are as follows:
Step 3.2, road network is calculated in period j than characteristic parameter and section weight according to the real-time travel speed in each section
Interior stroke speed ratio TSRj, the real-time travel speed of road network is exported than characteristic index, calculation formula are as follows:
Step 3.3, according to the real-time congestion status characteristic parameter in each section, road network congestion mileage ratio in period j is calculated
CMRj, the real-time congestion mileage of road network is exported than characteristic index, calculation formula are as follows:
Further, it in step 4, according to road network real-time traffic operation characteristic index, with 24 hours for measurement period, calculates
Than three the whole day congestion time ratio of road network, whole day peak travel speed ratio, whole day peak congestion mileage whole day traffic circulations
State index；It specifically includes:
Step 4.1, travel speed ratio TSR is calculated than characteristic index according to the real-time travel speed of road networkjMore than or equal to congestion
The duration of the period of state threshold obtains the road network congestion duration T of whole daycon, calculation formula are as follows:
Wherein, cj: the congestion status of road network in period j, 1 represents in congestion status, and 0 represents in normal operation shape
State；The duration of each period is T1；Intraday period total quantity NT；
Step 4.2, by TconDivided by the whole day congestion time ratio CTR of whole day duration calculation road network, exports road network whole day and gather around
Stifled time ratio state index；
Step 4.3, according to the real-time travel speed of road network than characteristic index, to continuous 60 minutes road network travel speed ratios into
Row sliding average takes in 0-12 point and 12-24 point sliding average maximum 60 minutes respectively, is defined as the early top of whole day
Hour and late top hour；
Step 4.4, the road network travel speed in early top hour and late top hour is calculated than average value, is defined as
The peak travel speed ratio TSR of whole day, output road network whole day peak travel speed compare state index；
Step 4.5, the real-time congestion mileage of road network in early top hour and late top hour is calculated than peak value, definition
For the peak congestion mileage ratio CMR of whole day, exports road network whole day peak congestion mileage and compare state index.
Further, in step 4.3, early top hour starts period PAMAnd late top hour starts period PPM
Calculation formula are as follows:
Wherein,
In morning, the beginning period is that the road network travel speed in continuous 60 minutes of j compares average value；
In afternoon, the beginning period is that the road network travel speed in continuous 60 minutes of j compares average value；
A length of 5 minutes when the period, 0-12 point includes the 1-144 period, and 12-24 point includes the 145-288 period；In 60 minutes
Period ordinal number x；
In step 4.4, calculation formula are as follows:
TSR=(TSRAM+TSRPM)/2
Wherein,
TSRAM: the road network average travel speed ratio in early top hour；
TSRPM: the road network average travel speed ratio in late top hour.
In step 4.5, calculation formula are as follows:
CMRAM=max (CMRj) j=PAM, PAM+ 1 ... PAM+11
CMRPM=max (CMRj) j=PPM, PPM+ 1 ... PPM+11
CMR=max (CMRAM,CMRPM)
Wherein,
CMRAM: the real-time congestion mileage of road network in early top hour compares peak value；
CMRPM: the real-time congestion mileage of road network in late top hour compares peak value.
Further, step 5 specifically includes:
Step 5.1, the average value for calculating the road network whole day congestion time ratio that same date does not obtain in designated period of time, obtains
Road network congestion time ratio evaluation index P-CTR in designated period of time；
Step 5.2, the average value for calculating the road network whole day peak travel speed ratio that same date does not obtain in designated period of time, is obtained
Take the road network peak travel speed in designated period of time than evaluation index P-TSR；
Step 5.3, the road network whole day peak travel speed that same date obtains in calculating designated period of time than standard deviation and is put down
The ratio of mean value obtains the road network travel speed day deviation factor evaluation index P-SDC in designated period of time；
Step 5.4, the average value for calculating the road network whole day peak congestion mileage ratio that same date does not obtain in designated period of time, is obtained
Take the road network peak congestion mileage in designated period of time than evaluation index P-CMR.
Further, when there are multiple cities to carry out that assessment is comprehensively compared, the road grid traffic operation situation in each city is commented
Estimate index to be standardized, obtains congestion time ratio, peak travel speed ratio, travel speed day deviation factor, peak congestion
The standardized value of than four road grid traffic operation situation evaluation indexes of mileage.
The present invention has the advantages that the invention proposes the urban road traffic state assessment method of various dimensions, by " real
When-whole day-designated period of time " the advanced calculation process of layering, realize traffic circulation Situation Assessment index based on statistical data
Progressive calculating deeply excavates urban highway traffic in the characteristic rule of the time dimensions such as time-varying, day change, facilitates comprehensive characterization
With assessment urban highway traffic operation conditions；It, will be different meanwhile by the standardized calculation to traffic circulation Situation Assessment index
Dimension and the index of the order of magnitude are converted into Unified Metric standardized value, improve the comparativity of index, facilitate between different cities
The lateral comparison of traffic circulation situation is analyzed.
Detailed description of the invention
Fig. 1 is method overview flow chart of the invention.
Fig. 2 is calculating section real-time traffic operation characteristic parameter flow chart of the invention.
Fig. 3 is calculating road network real-time traffic operation characteristic index flow chart of the invention.
Fig. 4 is calculating road network whole day traffic circulation state index flow chart of the invention.
Fig. 5 is road grid traffic operation situation evaluation index flow chart in calculating designated period of time of the invention.
Specific embodiment
Below with reference to specific drawings and examples, the invention will be further described.
A kind of urban road traffic state assessment method of various dimensions, comprising the following steps:
Step 1, it is to divide section with intersection center, given city road network is divided into m section, records each section
Road section length and section speed limit；For the vehicle for using specified mobile unit software or cell phone software, the GPS per second for obtaining vehicle
Location information, at the time of record vehicle ingresses and egresses out each section；
It step 2,, will be complete with 5 minutes for interval at the time of ingressing and egressing out each section according to the vehicle that each section is recorded
It is divided into 288 periods, at the end of each period, calculate each section it is real-time net vehicle number, real-time travel speed ratio,
Three real-time traffic operation characteristic parameters of real-time congestion status；As shown in Figure 2；
Step 2.1, it for section i, after with 5 minutes period j for interval, filters out in the period and leaves section
Vehicle；
Step 2.2, the vehicle fleet n that calculating sifting goes outij, section of the section i in period j is defined as in real time in net vehicle
Number exports section in real time in net vehicle number characteristic parameter；
Step 2.3, for the vehicle filtered out, at the time of ingressing and egressing out each section according to vehicle, it is logical to calculate each car
Cross the journey time of section i
Step 2.4, average travel speed v of the section i in period j is calculatedij, calculation formula are as follows:
vij=li/tij
Wherein,
The journey time for the kth vehicle that section i passes through in period j；
tij: average travel time of the section i in period j；
li: the road section length of section i；
Step 2.5, travel speed ratio TSR of the section i in period j is calculatedij(Travel Speed Ratio) exports road
The real-time travel speed of section is than characteristic parameter, calculation formula are as follows:
Wherein,The section speed limit of section i；
Step 2.6, congestion status value c of the section i in period j is calculatedij, as travel speed ratio TSRijMore than or equal to 2
When, judgement is in congestion status, enables congestion status value cijIt is 1；Conversely, working as travel speed ratio TSRijWhen less than 2, judgement is in
Normal operating condition enables congestion status value cijIt is 0；Export road congestion state characteristic parameter, calculation formula are as follows:
Step 3, the row of road network is calculated at the end of each period according to the real-time traffic operation characteristic parameter in each section
Than two journey speed ratio, congestion mileage real-time traffic operation characteristic indexs；As shown in Figure 3；
Step 3.1, according to the real-time in net vehicle number characteristic parameter of each section, section power of the section i in period j is calculated
Weight wij, calculation formula are as follows:
Step 3.2, road network is calculated in period j than characteristic parameter and section weight according to the real-time travel speed in each section
Interior stroke speed ratio TSRj, the real-time travel speed of road network is exported than characteristic index, calculation formula are as follows:
Step 3.3, according to the real-time congestion status characteristic parameter in each section, road network congestion mileage ratio in period j is calculated
CMRj(Congestion Mileage Ratio) exports the real-time congestion mileage of road network than characteristic index, calculation formula are as follows:
Step 4, the whole day of road network is calculated with 24 hours for measurement period according to road network real-time traffic operation characteristic index
Than three congestion time ratio, whole day peak travel speed ratio, whole day peak congestion mileage whole day traffic circulation state indexs；Such as
Shown in Fig. 4；
Step 4.1, travel speed ratio TSR is calculated than characteristic index according to the real-time travel speed of road networkjWhen more than or equal to 2
The duration of section, obtain the road network congestion duration T of whole daycon, calculation formula are as follows:
Wherein, cj: the congestion status of road network in period j, 1 represents in congestion status, and 0 represents in normal operation shape
State；The duration of each period is 5 minutes；Intraday period total quantity 288；
Step 4.2, by TconDivided by the whole day congestion time ratio CTR (Congestion of whole day duration calculation road network
Time Ratio), export road network whole day congestion time ratio state index, calculation formula are as follows:
CTR=Tcon/1440
In above formula, whole day is 1440 minutes；
Step 4.3, according to the real-time travel speed of road network than characteristic index, to continuous 60 minutes road network travel speed ratios into
Row sliding average takes in 0-12 point and 12-24 point sliding average maximum 60 minutes respectively, is defined as the early top of whole day
Hour and late top hour, early top hour start period PAMAnd late top hour starts period PPMCalculation formula
Are as follows:
Wherein,
In morning, the beginning period is that the road network travel speed in continuous 60 minutes of j compares average value；
In afternoon, the beginning period is that the road network travel speed in continuous 60 minutes of j compares average value；
A length of 5 minutes when due to the period, 0-12 point includes the 1-144 period, and 12-24 point includes the 145-288 period；X is 60
Period ordinal number in minute；
Step 4.4, the road network travel speed in early top hour and late top hour is calculated than average value, is defined as
The peak travel speed ratio TSR of whole day exports road network whole day peak travel speed than state index, calculation formula are as follows:
TSR=(TSRAM+TSRPM)/2
Wherein,
TSRAM: the road network average travel speed ratio in early top hour；
TSRPM: the road network average travel speed ratio in late top hour.
Step 4.5, the real-time congestion mileage of road network in early top hour and late top hour is calculated than peak value, definition
For the peak congestion mileage ratio CMR of whole day, road network whole day peak congestion mileage is exported than state index, calculation formula are as follows:
CMRAM=max (CMRj) j=PAM, PAM+ 1 ... PAM+11
CMRPM=max (CMRj) j=PPM, PPM+ 1 ... PPM+11
CMR=max (CMRAM,CMRPM)
Wherein,
CMRAM: the real-time congestion mileage of road network in early top hour compares peak value；
CMRPM: the real-time congestion mileage of road network in late top hour compares peak value.
Step 5, according to the road network whole day traffic circulation state index that same date does not obtain in designated period of time, when calculating specified
Than four road network congestion time ratio, peak travel speed ratio, travel speed day deviation factor, peak congestion mileage road networks in phase
Traffic circulation Situation Assessment index；As shown in Figure 5；
Step 5.1, the average value for calculating the road network whole day congestion time ratio that same date does not obtain in designated period of time, obtains
Road network congestion time ratio evaluation index P-CTR in designated period of time, calculation formula are as follows:
Wherein, CTRr: the r days road network whole day congestion time ratios；D: the number of days for including in designated period of time；
Step 5.2, the average value for calculating the road network whole day peak travel speed ratio that same date does not obtain in designated period of time, is obtained
Take the road network peak travel speed in designated period of time than evaluation index P-TSR, calculation formula are as follows:
Wherein, TSRr: the r days road network whole day peak travel speed ratios；
Step 5.3, the road network whole day peak travel speed that same date obtains in calculating designated period of time than standard deviation and is put down
The ratio of mean value obtains the road network travel speed day deviation factor evaluation index P-SDC in designated period of time, calculation formula are as follows:
P-SDC=σ/μ
Wherein,
μ: the average value of road network whole day peak travel speed ratio in designated period of time；
σ: the standard deviation of road network whole day peak travel speed ratio in designated period of time；
Step 5.4, the average value for calculating the road network whole day peak congestion mileage ratio that same date does not obtain in designated period of time, is obtained
Take the road network peak congestion mileage in designated period of time than evaluation index P-CMR, calculation formula are as follows:
Wherein, CMRr: the r days road network whole day peak congestion mileage ratios.
Designated period of time in the present invention can be period on working day weekly；
Step 6, when there are multiple cities to carry out that assessment is comprehensively compared, the road grid traffic operation situation assessment in each city is referred to
Mark is standardized, and obtains congestion time ratio, peak travel speed ratio, travel speed day deviation factor, peak congestion mileage
The standardized value of than four road grid traffic operation situation evaluation indexes；
Enable I1、I2、I3、I4Respectively indicate congestion time ratio, peak travel speed ratio, travel speed day deviation factor, high
Than four Situation Assessment indexs of peak congestion mileage, the standardized value calculation formula of index are as follows:
Wherein,
The standardized value of s-th of city, z-th of Situation Assessment index, z=1,2,3,4；
Isz: s-th of z-th of city Situation Assessment index actual value, z=1,2,3,4；
The average value in z-th of all city of Situation Assessment index, z=1,2,3,4；
Q: the city numbers in the collection of given city.
It is a concrete instance below, by selecting congestion time ratio, peak travel speed ratio, travel speed day deviation
Coefficient, peak congestion mileage carry out comprehensive assessment to ten typical urban traffic circulation situation than four indices；
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (8)
1. a kind of urban road traffic state assessment method of various dimensions, which comprises the following steps:
Step 1, vehicles while passing each section moment is obtained according to vehicle location information；
A length of interval when step 2, to set the period calculates section real-time traffic operation characteristic parameter；
A length of interval when step 3, to set the period calculates road network real-time traffic operation characteristic index；
Step 4, with the when a length of measurement period in day, road network whole day traffic circulation state index is calculated；
Step 5, it according to the road network whole day traffic circulation state index that same date does not obtain in designated period of time, calculates in designated period of time
Road grid traffic operation situation evaluation index.
2. the urban road traffic state assessment method of various dimensions as described in claim 1, which is characterized in that
In step 2, at the end of each period, calculate each section it is real-time in net vehicle number, real-time travel speed ratio, in real time gather around
Stifled three real-time traffic operation characteristic parameters of state；It specifically includes:
Step 2.1, it for section i, when to set the period after period j at a length of interval, filters out and is left in the period
The vehicle in section；
Step 2.2, the vehicle fleet n that calculating sifting goes outij, it is defined as section of the section i in period j in real time in net vehicle number,
Section is exported in real time in net vehicle number characteristic parameter；
Step 2.3, it for the vehicle filtered out, at the time of ingressing and egressing out each section according to vehicle, calculates each car and passes through road
The journey time of section i
Step 2.4, average travel speed v of the section i in period j is calculatedij, calculation formula are as follows:
vij=li/tij
Wherein,
The journey time for the kth vehicle that section i passes through in period j；
tij: average travel time of the section i in period j；
li: the road section length of section i；
Step 2.5, travel speed ratio TSR of the section i in period j is calculatedij, the output real-time travel speed in section is than feature ginseng
Number, calculation formula are as follows:
Wherein,The section speed limit of section i；
Step 2.6, congestion status value c of the section i in period j is calculatedij, as travel speed ratio TSRijMore than or equal to corresponding setting
When threshold value, judgement is in congestion status, enables congestion status value cijIt is 1；Conversely, working as travel speed ratio TSRijLess than corresponding setting
When threshold value, judgement is in normal operating condition, enables congestion status value cijIt is 0；Road congestion state characteristic parameter is exported, is calculated public
Formula are as follows:
Wherein thd1 is congestion status threshold value.
3. the urban road traffic state assessment method of various dimensions as claimed in claim 2, which is characterized in that
In step 3, the stroke of road network is calculated at the end of each period according to the real-time traffic operation characteristic parameter in each section
Than two speed ratio, congestion mileage real-time traffic operation characteristic indexs；
Step 3.1, according to the real-time in net vehicle number characteristic parameter of each section, section weight of the section i in period j is calculated
wij, calculation formula are as follows:
Step 3.2, road network is calculated in period j expert than characteristic parameter and section weight according to the real-time travel speed in each section
Journey speed ratio TSRj, the real-time travel speed of road network is exported than characteristic index, calculation formula are as follows:
Step 3.3, according to the real-time congestion status characteristic parameter in each section, road network congestion mileage ratio CMR in period j is calculatedj,
The real-time congestion mileage of road network is exported than characteristic index, calculation formula are as follows:
4. the urban road traffic state assessment method of various dimensions as claimed in claim 3, which is characterized in that
In step 4, according to road network real-time traffic operation characteristic index, with 24 hours for measurement period, the whole day for calculating road network is gathered around
Stifled time ratio, than three whole day peak travel speed ratio, whole day peak congestion mileage whole day traffic circulation state indexs；Specifically
Include:
Step 4.1, travel speed ratio TSR is calculated than characteristic index according to the real-time travel speed of road networkjMore than or equal to congestion status
The duration of the period of threshold value obtains the road network congestion duration T of whole daycon, calculation formula are as follows:
Wherein, cj: the congestion status of road network in period j, 1 represents in congestion status, and 0 representative is in normal operating condition；It is each
The duration of period is T1；Intraday period total quantity NT；
Step 4.2, by TconDivided by the whole day congestion time ratio CTR of whole day duration calculation road network, when exporting the congestion of road network whole day
Between ratio state index；
Step 4.3, continuous 60 minutes road network travel speed ratios are slided than characteristic index according to the real-time travel speed of road network
It is dynamic average, it is taken in 0-12 point and 12-24 point respectively sliding average maximum 60 minutes, is defined as the early top hour of whole day
And late top hour；
Step 4.4, the road network travel speed in early top hour and late top hour is calculated than average value, is defined as whole day
Peak travel speed ratio TSR, output road network whole day peak travel speed compare state index；
Step 4.5, the real-time congestion mileage of road network in early top hour and late top hour is calculated than peak value, is defined as complete
It peak congestion mileage ratio CMR, output road network whole day peak congestion mileage compare state index.
5. the urban road traffic state assessment method of various dimensions as claimed in claim 4, which is characterized in that
In step 4.3, early top hour starts period PAMAnd late top hour starts period PPMCalculation formula are as follows:
PAM=y
PPM=y
Wherein,
In morning, the beginning period is that the road network travel speed in continuous 60 minutes of j compares average value；Afternoon
Interior, the beginning period is that the road network travel speed in continuous 60 minutes of j compares average value；
A length of 5 minutes when the period, 0-12 point includes the 1-144 period, and 12-24 point includes the 145-288 period；Period in 60 minutes
Ordinal number x；
In step 4.4, calculation formula are as follows:
TSR=(TSRAM+TSRPM)/2
Wherein,
TSRAM: the road network average travel speed ratio in early top hour；
TSRPM: the road network average travel speed ratio in late top hour.
In step 4.5, calculation formula are as follows:
CMRAM=max (CMRj) j=PAM, PAM+ 1 ... PAM+11
CMRPM=max (CMRj) j=PPM, PPM+ 1 ... PPM+11
CMR=max (CMRAM,CMRPM)
Wherein,
CMRAM: the real-time congestion mileage of road network in early top hour compares peak value；
CMRPM: the real-time congestion mileage of road network in late top hour compares peak value.
6. the urban road traffic state assessment method of various dimensions as claimed in claim 4, which is characterized in that
Step 5 specifically includes:
Step 5.1, the average value for calculating the road network whole day congestion time ratio that same date does not obtain in designated period of time obtains specified
Road network congestion time ratio evaluation index P-CTR in period；
Step 5.2, the average value for the road network whole day peak travel speed ratio that same date does not obtain in designated period of time is calculated, acquisition refers to
Road network peak travel speed in the timing phase is than evaluation index P-TSR；
Step 5.3, the road network whole day peak travel speed that same date obtains in calculating designated period of time is than standard deviation and average value
Ratio, obtain designated period of time in road network travel speed day deviation factor evaluation index P-SDC；
Step 5.4, the average value for the road network whole day peak congestion mileage ratio that same date does not obtain in designated period of time is calculated, acquisition refers to
Road network peak congestion mileage in the timing phase is than evaluation index P-CMR.
7. the urban road traffic state assessment method of various dimensions as described in claim 1, which is characterized in that
Further include step 6, when there are multiple cities to carry out that assessment is comprehensively compared, for specified city collection, obtains each city road
The standardized value of net traffic circulation Situation Assessment index.
8. the urban road traffic state assessment method of various dimensions as claimed in claim 6, which is characterized in that
When there are multiple cities to carry out that assessment is comprehensively compared, standard is carried out to the road grid traffic operation situation evaluation index in each city
Change, obtains congestion time ratio, peak travel speed ratio, than four travel speed day deviation factor, peak congestion mileage road networks
The standardized value of traffic circulation Situation Assessment index.
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